class Student(object):
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def print_score(self):
        print('%s:%s' % (self.name, self.age))


if __name__ == '__main__':
    jim = Student('jim', 18)
    bob = Student('bob', 20)

    jim.print_score()
    bob.print_score()



